Question

A bus makes a stop at 2:30 it's letting off 15 people and letting on 9 the bus makes another stop 10 minutes later to let off 4 more people how does the number of people on the bus after the second stop compare the number of people on the bus before the 2:30 it stop

Answer 1

Initially, it lets off 15 people but picks up 9, for a total change of losing 6 people.  If it lets off 4 more people, it has then lost 10 people total.

Answer 2

Answer:
The original number of passengers on the bus decreased by 10 after the second stop

Explanation:
Assume that the total passengers on the bus before 2:30 was x

Now, at 2:30:
15 passengers got off and 9 got on.
This means that:
number of passengers = x - 15 + 9 
number of passengers = x -6

10 minutes later:
4 passengers got off the bus
This means that:
number of passengers = (x-6) - 4
number of passengers = x - 10

By comparing, we can note that:
The original number of passengers on the bus decreased by 10 after the second stop

Hope this helps :)